What does P0335 mean?
The engine control module lost the crankshaft position signal — the engine may stall or refuse to start.
Quick Decision Guide
- Failed crankshaft position sensor
- Damaged wiring or connector at the CKP sensor
- Excessive crankshaft end-play (worn thrust bearing)
When to stop driving
P0335 can cause stalling at highway speed without warning, which is a serious safety risk. If you experience intermittent stalling, do not drive until the sensor is replaced. If the engine won't start, do not repeatedly crank — have it towed.
Reviewed by ratchit Automotive Solutions for clarity and inspection-first safety framing. Not a substitute for professional diagnosis.
Repair Decision & Cost Guide
Use this guide to decide what to inspect first, what it may cost, and when to move from DIY checks to professional diagnosis.
P0335 is a clue, not a confirmed diagnosis. Inspect simple causes before replacing parts.
DIY vs. Shop
Can you keep driving?
Best first DIY check
Don't replace this first
When to seek a shop
Recommended next action
Estimated Repair Cost
Inspection cost
$0–$25 DIY scanner
DIY parts cost
$10–$60
Inspect first before replacing parts.
If the vehicle is unsafe to drive, stop driving and seek professional help.
Shop diagnostic cost
$80–$150 (typical shop diagnostic fee)
Shop repair cost
$80–$300
Diagnostic uncertainty: This code points to a system or condition, not a guaranteed failed part. Inspect before replacing.
Cost variation: Costs vary by vehicle, location, part quality, labor rate, and the confirmed root cause.
Inspect Before Replacing
These checks are cheap, fast, and rule out the most common causes before spending money on parts.
- 1Do NOT repeatedly crank the engine if it won't start — you risk draining the battery and flooding cylinders.
- 2Inspect the CKP sensor connector for corrosion, oil contamination, or damaged pins.
Track this ignition/timing issue
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Understanding P0335 in detail
The crankshaft position sensor (CKP) is one of the most critical engine sensors. It tells the ECM the exact rotational position and speed of the crankshaft, which the ECM uses to time fuel injection and ignition. Without a reliable CKP signal, the ECM cannot fire the injectors or spark plugs at the correct moment — and in many cases, the engine will simply shut off or refuse to start. P0335 means the ECM detected an absent, erratic, or out-of-range signal from the CKP sensor circuit. The sensor itself can fail (they are electromagnetic and degrade with heat exposure over time), or the wiring between the sensor and ECM can develop shorts, opens, or corrosion — especially at the connector, which sits in a harsh underhood environment. A failing CKP sensor often produces intermittent symptoms first: random stalling, momentary engine cuts during driving, or hard-start conditions before progressing to a complete no-start.
Symptoms of P0335
- Engine stalls unexpectedly while driving
- Intermittent or complete no-start condition
- Engine cranks but won't fire
- Tachometer drops to zero momentarily while driving
- Check engine light on
Common causes
- Failed crankshaft position sensor
- Damaged wiring or connector at the CKP sensor
- Excessive crankshaft end-play (worn thrust bearing)
- Damaged reluctor ring (tone wheel) on the crankshaft
- ECM fault (rare)
How to diagnose P0335
Steps ordered by urgency — tackle Now items first.
- NowDo NOT repeatedly crank the engine if it won't start — you risk draining the battery and flooding cylinders.
- NowInspect the CKP sensor connector for corrosion, oil contamination, or damaged pins.
- SoonTest the CKP sensor with a multimeter (resistance test) or scan for an RPM signal while cranking.
- LaterIf the sensor and wiring test good, inspect the reluctor ring for missing teeth or damage.
How to fix P0335
Fixes listed in order of likelihood and cost-efficiency.
- 1Replace crankshaft position sensor
- 2Repair or replace CKP wiring harness
- 3Clean corroded sensor connector
- 4Replace damaged reluctor ring (rare, labor-intensive)
Want to check your full vehicle?
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Recommended tools & parts
These recommendations appear because this issue commonly requires inspection in this system area. ratchit does not recommend replacing parts until the likely cause is confirmed.
Sensor & Diagnostic Kit
Test and replace common engine sensors — O2, MAF, cam/crank
Check sensor behavior before replacing parts Verify fitment for your year/make/model.
Ignition & Misfire Inspection Kit
Inspect spark plugs, coils, and ignition components before replacing parts
Inspect spark plugs, coils, and misfire causes before buying parts Verify fitment for your year/make/model.
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Estimated Repair Cost — P0335
Ranges vary by vehicle, region, and shop. Use as a ballpark — always get a quote.
DIY estimate
$20 – $60
Shop estimate
$100 – $300
DIY estimate
$10 – $40
Shop estimate
$80 – $250
Cost data is estimated and may not reflect your specific vehicle or location.
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Frequently Asked Questions
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